Are You Smarter Than A 9th Grader In Science

When an electrical fire occurs, it is not safe to extinguish it by dousing it with water because water conducts electricity and can cause electrocution. However, fire extinguishers that spray solid carbon dioxide on the fire are effective. Carbon dioxide displaces the oxygen in the surrounding area, which is necessary for the fire to burn. Without oxygen, the fire cannot sustain itself and is extinguished. Therefore, displacing the oxygen is the correct answer.

C6H12O6 is the molecular formula for glucose, a type of sugar. Glucose is a simple carbohydrate that is used by the body as a source of energy. It is commonly found in foods such as fruits, vegetables, and grains. Glucose is an essential fuel for the cells in our body and plays a crucial role in various metabolic processes.

Proteins are made up of amino acids. Amino acids are organic compounds that contain both an amino group and a carboxyl group. They are the building blocks of proteins and are linked together through peptide bonds to form long chains. These chains then fold and interact to create the unique structure and function of each protein. RNA and codons are involved in the process of protein synthesis, but they are not the actual components that make up proteins. Lipids, on the other hand, are a different type of biomolecule and are not involved in protein formation.

The correct answer is signaling muscle tissues to contract. The nervous system plays a crucial role in coordinating and controlling the body's movements. It sends electrical signals, known as nerve impulses, to muscle tissues, which then contract in response to these signals. This allows for voluntary and involuntary movements, such as walking or digesting food. The other options mentioned, such as releasing ATP, producing lactic acid, and increasing cellular respiration, are not specific functions of the nervous system.

The Moon's thin atmosphere is the primary reason for the extreme temperature difference between its sun-facing side and dark side. Unlike the Earth, which has a thick atmosphere that helps distribute heat, the Moon's thin atmosphere cannot effectively regulate temperature. As a result, the sun-facing side of the Moon becomes very hot due to direct exposure to the sun's rays, while the dark side remains very cold as it lacks the atmosphere to trap and retain heat. The Moon's mineral composition, reflective rock, and lack of volcanic activity do not play a significant role in causing the extreme temperature difference.

The roller coaster has the most kinetic energy at the bottom of the biggest hill. This is because kinetic energy is directly proportional to the square of the velocity of an object. As the roller coaster descends from the top of the hill, it gains speed and therefore its velocity increases. Since kinetic energy is dependent on velocity, the roller coaster will have the most kinetic energy at the point where it has the highest velocity, which is at the bottom of the biggest hill.

Prophase is the correct answer because it is the first phase of the cell cycle. During prophase, the genetic material inside the nucleus condenses and becomes visible as chromosomes. The nuclear envelope also starts to break down, and the spindle fibers begin to form. This phase prepares the cell for division by ensuring that the genetic material is properly organized and ready to be separated into two daughter cells.

Aerobic cellular respiration is a process in which glucose is broken down to produce energy. The first step is glycolysis, where glucose is converted into pyruvate. The pyruvate then enters the Krebs cycle, also known as the citric acid cycle, where it is further broken down and produces molecules that carry energy. Finally, the energy-carrying molecules produced in the Krebs cycle enter the electron transport chain, where they are used to generate ATP, the main energy currency of cells. Therefore, the correct answer is glycolysis, Krebs cycle, and electron transport chain.

The age of the Earth is estimated to be around 4.5 million years old. This estimation is based on various scientific methods and evidence, such as radiometric dating of rocks and minerals, the study of fossils, and the analysis of the Earth's geological processes. These methods have provided consistent results and support the understanding that the Earth has been evolving and changing over a long period of time.

The correct answer is Plasma Membrane. The plasma membrane, also known as the cell membrane, is a thin, semi-permeable barrier that surrounds the cell and separates the interior of the cell from its external environment. It controls the movement of substances in and out of the cell, allowing nutrients to enter and waste products to exit. The plasma membrane is essential for maintaining the integrity and functionality of the cell.

The scientific method is a systematic approach used to investigate natural phenomena. It involves several steps, including asking a question, conducting research, making a hypothesis, designing and conducting an experiment, analyzing data, drawing conclusions, and communicating the results. In the given list, the answers "Experiment," "Analyze Data," "Make a Hypothesis," "Research," "Draw Conclusion," and "Ask a Question" are all steps that are part of the scientific method.

The answer options provided indicate the possible time durations since the person was in 9th grade. The first option "In 9th grade" suggests that the person is currently in 9th grade. The second option "1-5 years" implies that the person has been out of 9th grade for a period ranging from 1 to 5 years. The third option "6-11 years" indicates that the person has been out of 9th grade for a period ranging from 6 to 11 years. The last option "12 and over" suggests that the person has been out of 9th grade for 12 years or more.

The correct answer is All A's. This answer includes all possible combinations of grades from A's to B's, B's to C's, and C's and lower. It also includes the possibility of having all A's or all B's, which are both included in the answer choice.

The answer options provided in this question represent different levels of education attainment. "Not out of High School yet?" indicates that the person has not completed high school and therefore has not started college. "1-2 years of college" suggests that the person has completed one to two years of college education. "3-4 years of college" indicates that the person has completed a bachelor's degree, which typically takes four years. "Over 4 years" suggests that the person has completed more than four years of college, possibly indicating that they have pursued further education beyond a bachelor's degree.

This question is asking about the respondent's gender. The answer options provided are "Male" and "Female," indicating that the question is asking for a binary choice between these two genders. The correct answer would depend on the individual's self-identified gender.

This question is asking about the age of the respondent. The answer choices are divided into different age ranges: under 18, 18-30 years old, 30-45 years old, and 45 and older. The correct answer includes all the age ranges mentioned in the answer choices, indicating that the question is open to respondents of any age.